A dialectal variation of collywest, collyweston. See collyweston.
The Century Dictionary (Public Domain)
Use "galley-west" in a sentence
"Several times he succeeded in drawing himself up a foot or so, and then would come a fatal slip that knocked his plans "galley-west," as Phil would have said."
"For Mr. Best I compiled the list of the new members who have been brought in, with the people who have brought in the greatest number, but that thing went galley-west in the last few days by the strong finishers."
"Peters got mad yesterday an 'knocked that grinnin' Yorke galley-west!"